Particle ID was successfully reconstructed from 4 GeV data, C1<100&&C2<100.

X-Axis : (TDC_{strip3_left} + TDC_{strip3_right}) - (TDC_{Sci_BNL_1} + TDC_{Sci_BNL_2})

Y-Axis:  No. of Count

Right Peak: Proton

Left Peak: Other Particles

CUTs:  Cherenkov1<100&&Cherenkov2<100, for cleanup electrons.

Note:  X value is related to particles' time-of-flight, proton has heaver mass therefore distributes to far side.

Conclusion: MRPCs' timing resolution is good enough to separate Proton from other particles, even before slewing correction. Time-of-flight difference between the two peaks is consistent with our estimation. 
 

Fig 1: Proton Peak by Cherenkov C1 and C2 Selection, Module #1